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Live trends in quantum computing research, updated daily from arXiv.
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ARMOR-IMC: Adaptive Resource Mapping for Operational Robustness via Secure In-Memory Computing
Muhtasim Alam Chowdhury, Ramtin Zand, Soheil Salehi·Jul 12, 2026
The massive data-movement overhead in traditional architectures has led to the adoption of In-Memory Computing (IMC) for energy-efficient Deep Neural Network (DNN) processing. By leveraging emerging devices like Spin-Orbit Torque Magnetic Tunnel Junc...
A Cluster-Based Model of the Spectrum of Erbium-Doped GdVO$_4$
Zachary H. Roberts, Masaya Hiraishi, Luke S. Trainor +1 more·Jul 12, 2026
Experimental observations of rare-earth ions doped into an antiferromagnetic crystal show an enriched optical spectrum. In this paper we present a cluster-based model to describe erbium ions doped into a gadolinium vanadate (Er:GdVO$_4$) host crystal...
Krylov Complexity from Loschmidt Amplitude
Debarghya Chakraborty·Jul 12, 2026
Krylov complexity is a powerful diagnostic of quantum dynamics, with clear connections to other measures of quantum chaos and operator growth. One such measure is the Loschmidt amplitude, defined as the overlap of initially identical states evolved u...
Driven Quantum Stars as Controlled Primitives for Real-Time Spin Dynamics
Michael Chertkov·Jul 12, 2026
Quantum advantage in real-time spin dynamics should be assessed against the strongest relevant classical substitutes, not merely against the qubit nature of the microscopic system. We develop a physics-based diagnostic for this boundary by reducing a...
GroupFunctions.jl: computing individual entries of the irreducible representations of the unitary group U(d)
David Amaro-Alcalá, Konrad Szymański·Jul 12, 2026
GroupFunctions.jl is a Julia library for computing individual matrix elements of irreducible representations of U(d). These matrix elements, called group functions, can be evaluated symbolically or numerically. For SU(2), they reduce to the Wigner D-...
Thawed Gaussian Ehrenfest dynamics
Jiří J. L. Vaníček·Jul 12, 2026
Ehrenfest dynamics is a widely used mixed quantum--classical approach for nonadiabatic molecular dynamics, whereas thawed Gaussian wavepacket dynamics provides an efficient semiclassical description of adiabatic nuclear quantum dynamics. Here we desc...
Quantum-enhanced physical-layer threat detection in metropolitan-scale fiber networks
Yung-Cheng Kao, Siddharth Pal, Alex Forencich +8 more·Jul 12, 2026
Network security is widely recognized as a key application of quantum technology. However, its large-scale deployment is hindered by the need for tight coordination between fundamentally different quantum and classical processing steps in conventiona...
Demonstrating Quadratic Monte Carlo Speedup via Quantum Amplitude Estimation: Nuclear Engineering Examples
Jilang Miao, Miaomiao Jin, Akira Sone·Jul 12, 2026
We demonstrate quantum amplitude estimation (QAE) as a route to quadratic speedup for Monte Carlo-type expectation values in nuclear engineering. Using QPE-based QAE, we study two examples: a discrete fission-neutron-yield expectation and a U-238 res...
Spectral gap of Lee-Yang Hamiltonians
Chaithanya Rayudu, Jun Takahashi·Jul 12, 2026
The Lee-Yang theorem and its quantum extensions state that, for a broad class of Hamiltonians on any graph, the partition function's zeros in the complex magnetic field plane lie only on the imaginary axis. For these Hamiltonians, we prove that under...
Connectivity-induced surface-loss penalty in superconducting qubit-coupler lattices
Xu-Yang Gu, Gui-Han Liang, Ming-Chuan Wang +7 more·Jul 12, 2026
Recent advances in design and fabrication have increased the energy-relaxation times of isolated superconducting transmon qubits to the hundreds-of-microseconds regime, with reported values exceeding 500 $μ$s. However, the same progress has not autom...
Accessing 100 GHz Mechanical Modes in Bulk Crystals at Cryogenic Temperatures
Boxuan Tian, Jiacheng Xie, Hong X. Tang·Jul 12, 2026
Sub-terahertz electromechanics offers a promising route to probe mechanical quantum motion at experimentally friendly Kelvin temperatures. Traditionally, high-frequency mechanical resonators rely on advanced microfabrication to shape complex microstr...
Nonlocal nonstabilizerness for slightly entangled quantum many-body states
Lei-Yi-Nan Liu, Jian Cui·Jul 12, 2026
Nonlocal nonstabilizerness quantifies the irreducible magic resource encoded in bipartite entanglement, but its evaluation is generally hindered by a highly nonconvex optimization over local unitary transformations. Here we propose a Schmidt-referenc...
MDQEC-QAS: Meta-Decoding for Quantum Error Correction with Hardware-Aware VQC Search and Confidence-Gated Recovery
Prashant Kumar Choudhary, Nouhaila Innan, Muhammad Shafique +1 more·Jul 12, 2026
We propose a unified meta-decoding framework for quantum error correction that learns syndrome-to-recovery mappings across multiple stabilizer codes and noise settings, without requiring separate decoders for each configuration. The benchmark include...
Passive spectral-admittance bounds and exact continuum certificates for multiresonator quantum-memory interfaces
Maxim V. Churilov·Jul 12, 2026
Broadband quantum-memory interfaces are often assessed by center-frequency impedance matching or by a sampled efficiency curve. Neither supplies an operational continuous-band certificate, and absorption is not automatically reversible storage. We mo...
Certified boundary-magic witness for state-dependent proto-area in a holographic code
Luis Lozano·Jul 12, 2026
We study a four-qubit product-EPR holographic code whose reconstructing region contains matter and one leg of a geometry bond. Seven deformations compare local, bipartite, bond-stabilizing, and bond-moving operators. Exact spectra show that only matt...
Security of passive entanglement-based key distribution protocols
Shun Kawakami, Koichi Takasugi, Koji Azuma·Jul 12, 2026
Entanglement-based key distribution protocols, such as the Bennett-Brassard-Mermin 1992 (BBM92) protocol and quantum conference key agreement (QCKA), are promising applications of quantum networks. In practical implementations, passive measurement se...
Learning Topological Quantum Phases from Limited Subsystems
Mehran Khosrojerdi, Sougato Bose, Alessandro Cuccoli +3 more·Jul 12, 2026
Characterizing quantum topological phases requires measuring non-local string order parameters, demanding access to the full system, which is often experimentally unfeasible. In this work, we introduce a data-efficient supervised learning framework t...
Semiclassical asymptotics of multiphotonic scattering probabilities with partial indistinguishability
Alonso Botero, Hubert de Guise, Orlando Melo-Vargas·Jul 12, 2026
We propose a framework for computing multiphotonic scattering probabilities in a lossless multiport interferometer for arbitrary photon numbers and degrees of indistinguishability. By exploiting a toroidal expansion of multiphotonic states in tensor ...
The Virtuous Cycle of Quantum-Classical Machine Learning
Nenad Tomašev, Jarrod R. McClean, Johannes Bausch·Jul 12, 2026
Artificial intelligence and quantum computing have both seen tremendous progress in recent years, opening up new avenues for accelerating scientific discovery. Classical machine learning has already proven to be useful for addressing challenges in qu...
Coherent Quantum Schrodinger Bridge: Two-Boundary Optimal Control for Quantum Algorithm Design
Masayuki Ohzeki·Jul 12, 2026
Quantum algorithms are intrinsically two-boundary processes: an input state is prepared, and an output state or subspace is selected as the computational answer. We formulate this observation as a coherent Quantum Schrödinger Bridge (QSB), a pure-sta...